<template>
  <el-container class="home-container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>

    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="iscCollapse ? '64px' :'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单 -->
        <el-menu :default-active='activePath' router :collapse-transition="false" :collapse="iscCollapse" :unique-opened="true" background-color="#333744" text-color="#fff" active-text-color="#409EFF">

          <!-- 一级菜单 -->
          <el-submenu :index="item.id+' '" v-for="item in menulist" :key="item.id">
            <template slot="title">
              <!-- 图标 -->
              <i :class='iconsObj[item.id]'></i>
              <!-- 文字 -->
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item @click="saveNavState('/'+subItem.path)" :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文字 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>

          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主内容 -->
      <!-- welcome组件的占位符 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>

export default {
  name: 'Home',
  components: {},
  data () {
    return {
      menulist: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao',
      },
      //是否折叠
      iscCollapse: false,
      activePath: '',

    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error('获取失败');
      this.menulist = res.data
    },
    //点击|||执行菜单的收缩和展开
    toggleCollapse () {
      this.iscCollapse = !this.iscCollapse
    },
    //点击将二级菜单被点击的页面值，传给menu标签，来决定哪个网页的菜单栏高亮
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath

    }
  }
}

</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  color: #fff;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>